TREA

Dan P. Westra

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  • Grand Haven, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Stacking cart
    • Patent number 4,429,889
    • Issue date Feb 7, 1984
    • The Challenge Machinery Company
    • Dan P. Westra
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Paper padding or tableting press
    • Patent number 4,146,942
    • Issue date Apr 3, 1979
    • The Challenge Machinery Company
    • Dan P. Westra
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER